diff --git a/.bashrc b/.bashrc
index ff03dbc..385da46 100644
--- a/.bashrc
+++ b/.bashrc
@@ -1,4 +1,4 @@
-[[ $- != *i* ]] && return
+[[ "$-" != *i* ]] && return
 
 set -o vi
 
@@ -11,5 +11,6 @@ for f in "$HOME/.config/bash/"*.bash; do
     # shellcheck disable=SC1090
     . "$f"
 done
+unset f
 
 stty werase undef